Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients Caregivers Providers
Log In Ask a Question
PubMed This is a summary of 19 peer-reviewed journal articles Updated
Dentistry

Symptoms, Subtypes, and Genetics of Dentinogenesis Imperfecta

At a Glance

Dentinogenesis Imperfecta (DI) is a genetic condition causing discolored, fragile teeth that wear down rapidly. While some types only affect the teeth, others are linked to brittle bone disease (Osteogenesis Imperfecta), making genetic testing crucial for proper care.

Understanding why teeth appear and behave differently in Dentinogenesis Imperfecta (DI) requires a look at both the outward symptoms and the internal genetic “blueprint.” While the condition may look similar across different patients from the outside, the underlying cause can vary significantly [1][2].

Common Symptoms and Visible Signs

The most striking feature of DI is the opalescent quality of the teeth—a translucent, shimmer-like appearance that can range in color from gray-blue to yellow-brown or amber [3][4].

Because the underlying dentin is soft and poorly mineralized, it cannot support the hard outer enamel [5]. This leads to several progressive symptoms:

  • Enamel Cracking and Flaking: The enamel often shears off the weak dentin shortly after the tooth emerges [6][7].
  • Progressive Severe Wear (attrition): Once the enamel is gone, the soft dentin wears down rapidly through normal chewing, sometimes flattening the teeth all the way down to the gum line [7][8].
  • Pulp Obliteration: Inside the tooth, the hollow space where nerves and blood vessels live (the pulp chamber) often fills up completely with abnormal dentin, making the inside of the tooth look “solid” on X-rays [8][9].

The Shields Classification and Modern Genetics

For decades, doctors have used the “Shields Classification” to group DI into three main types. However, modern genetic testing is shifting this approach, providing a more precise way to understand these differences based on DNA [1][10].

Shields Type Genetic Cause Connection to Bone Health Key Characteristics
Type I COL1A1 or COL1A2 genes [11] Linked to Osteogenesis Imperfecta (OI) [12] Dental issues occur alongside brittle bones and skeletal symptoms [13].
Type II DSPP gene [14] Isolated (No bone involvement) [15] The most common form; affects teeth only, with typical pulp obliteration [8].
Type III DSPP gene [16] Isolated (No bone involvement) [1] Rare; often features “shell teeth” with extremely thin dentin and massive, enlarged pulp chambers [1].

Note: Many researchers now believe Type II and Type III are simply different ends of the same genetic spectrum caused by mutations in the same gene (DSPP) [1][15].

Distinguishing DI from Other Conditions

It is critical for your dental team to distinguish DI from other hereditary dental defects, as the long-term management strategies can be completely different [17]. This process is called a differential diagnosis.

  • Dentin Dysplasia (DD): Like DI, this affects the dentin. However, in DD Type I (the most common form), the crowns of the teeth often look completely normal in color and shape, but the roots are extremely short, blunt, or “half-moon” shaped on X-rays [1]. Distinguishing DI from DD is vital because DD often leads to spontaneous tooth loss or abscesses due to the root defects, whereas DI is primarily a problem of rapid crown wear and breakage [18].
  • Amelogenesis Imperfecta (AI): AI is a defect of the enamel, not the dentin [6]. In AI, the outer “shell” of the tooth is the problem (it may be pitted, dangerously thin, or entirely missing), but the underlying dentin is usually healthy, hard, and structurally sound [7].

By identifying the exact gene involved—whether it is a collagen mutation (COL1A1/2) or a dentin-specific mutation (DSPP)—your care team can determine if you need additional screenings for bone density or hearing loss, which are sometimes associated with the syndromic forms of the condition [12][19].

Common questions in this guide

What are the main symptoms of Dentinogenesis Imperfecta?
The most noticeable sign is opalescent teeth that appear translucent and range in color from gray-blue to yellow-brown or amber. Because the underlying tooth structure is soft, the outer enamel often cracks or flakes off, leading to rapid and severe tooth wear.
What is the difference between Type I and Type II Dentinogenesis Imperfecta?
Type I is linked to Osteogenesis Imperfecta, meaning individuals have both fragile teeth and brittle bones due to a collagen gene mutation. Type II is the most common form and only affects the teeth, with no involvement of bone health.
Why do the teeth look solid on X-rays with this condition?
In this condition, the hollow space inside the tooth where nerves and blood vessels live often fills up completely with abnormal dentin. This process is called pulp obliteration and makes the inside of the tooth look solid on dental X-rays.
How does a doctor know if it is Dentinogenesis Imperfecta or another tooth defect?
Dentists use X-rays and genetic testing to confirm the diagnosis. Unlike Amelogenesis Imperfecta, which is a defect of the outer enamel, Dentinogenesis Imperfecta affects the inner dentin. Checking root length and pulp shape on X-rays also helps rule out Dentin Dysplasia.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Based on my/my child's symptoms, which Shields type do you suspect?
  2. 2.Does our specific dental presentation suggest we need to screen for Osteogenesis Imperfecta (OI)?
  3. 3.Are the internal chambers of the teeth becoming completely solid (obliterated), and how does that affect our treatment options?
  4. 4.How can we be certain this is DI and not Dentin Dysplasia or an enamel defect?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (19)
  1. 1

    Novel frameshift mutations in DSPP cause dentin dysplasia type II.

    Lee JW, Hong J, Seymen F, et al.

    Oral diseases 2019; (25(8)):2044-2046 doi:10.1111/odi.13182.

    PMID: 31454439
  2. 2

    Morphological and Ultrastructural Collagen Defects: Impact and Implications in Dentinogenesis Imperfecta.

    Gadi LSA, Chau DYS, Parekh S

    Dentistry journal 2023; (11(4)) doi:10.3390/dj11040095.

    PMID: 37185473
  3. 3

    Prevalence of Dentinogenesis Imperfecta in a French Population.

    Cassia A, Aoun G, El-Outa A, et al.

    Journal of International Society of Preventive & Community Dentistry 2017; (7(2)):116-119 doi:10.4103/jispcd.JISPCD_48_17.

    PMID: 28462180
  4. 4

    Phenotypic features of dentinogenesis imperfecta associated with osteogenesis imperfecta and COL1A2 mutations.

    Nutchoey O, Intarak N, Theerapanon T, et al.

    Oral surgery, oral medicine, oral pathology and oral radiology 2021; (131(6)):694-701 doi:10.1016/j.oooo.2021.01.003.

    PMID: 33737018
  5. 5

    X-ray microanalysis of dentine in primary teeth diagnosed Dentinogenesis Imperfecta type II.

    Sabel N, Norén JG, Robertson A, Cornell DH

    European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry 2020; (21(4)):527-535 doi:10.1007/s40368-018-0392-2.

    PMID: 31823211
  6. 6

    Dentinogenesis imperfecta type II- genotype and phenotype analyses in three Danish families.

    Taleb K, Lauridsen E, Daugaard-Jensen J, et al.

    Molecular genetics & genomic medicine 2018; (6(3)):339-349 doi:10.1002/mgg3.375.

    PMID: 29512331
  7. 7

    Early Rehabilitation of Incisors with Dentinogenesis Imperfecta Type II - Case Report.

    Beltrame AP, Rosa MM, Noschang RA, Almeida IC

    The Journal of clinical pediatric dentistry 2017; (41(2)):112-115 doi:10.17796/1053-4628-41.2.112.

    PMID: 28288297
  8. 8

    A novel approach to full-mouth rehabilitation of dentinogenesis imperfecta type II: Case series with review of literature.

    Zhang Y, Jin X, Zhang Z, et al.

    Medicine 2024; (103(4)):e36882 doi:10.1097/MD.0000000000036882.

    PMID: 38277536
  9. 9

    A Novel Diagnostic and Treatment Approach to an Unusual Case of Dens Invaginatus in a Mandibular Lateral Incisor Using CBCT and 3D Printing Technology.

    LaLonde L, Askar M, Paurazas S

    Dentistry journal 2024; (12(4)) doi:10.3390/dj12040107.

    PMID: 38668019
  10. 10

    [Progress in the classification of hereditary dentin disorders and clinical management strategies].

    Yuan GH, Chen Z

    Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology 2023; (58(4)):305-311 doi:10.3760/cma.j.cn112144-20230210-00041.

    PMID: 37005776
  11. 11

    Dentinogenesis Imperfecta and Caries in Osteogenesis Imperfecta among Vietnamese Children.

    Nguyen HTT, Vu DC, Nguyen DM, et al.

    Dentistry journal 2021; (9(5)) doi:10.3390/dj9050049.

    PMID: 33925433
  12. 12

    Dental Abnormalities in Osteogenesis Imperfecta: A Systematic Review.

    Ventura L, Verdonk SJE, Zhytnik L, et al.

    Calcified tissue international 2024; (115(5)):461-479 doi:10.1007/s00223-024-01293-2.

    PMID: 39294450
  13. 13

    Blue Sclera to Brittle Bones: A Rare Case of Osteogenesis Imperfecta With Dentinogenesis Imperfecta and Nephrocalcinosis.

    Hayat S, Mayan AR, Khan MW, Hayat QJ

    Journal of investigative medicine high impact case reports 2025; (13()):23247096251334237 doi:10.1177/23247096251334237.

    PMID: 40219777
  14. 14

    Dental Management of a Child with Dentinogenesis Imperfecta: A Case Report.

    Akhlaghi N, Eshghi AR, Mohamadpour M

    Journal of dentistry (Tehran, Iran) 2016; (13(2)):133-138.

    PMID: 27928242
  15. 15

    Dentin defects caused by a Dspp-1 frameshift mutation are associated with the activation of autophagy.

    Liang T, Smith CE, Hu Y, et al.

    Scientific reports 2023; (13(1)):6393 doi:10.1038/s41598-023-33362-1.

    PMID: 37076504
  16. 16

    Isolated dentinogenesis imperfecta: Novel DSPP variants and insights on genetic counselling.

    Hassib NF, Mehrez M, Mostafa MI, Abdel-Hamid MS

    Clinical oral investigations 2024; (28(5)):254 doi:10.1007/s00784-024-05636-z.

    PMID: 38630328
  17. 17

    [Genetic variants analysis and histological observation of teeth in a patient with hereditary opalescent dentin].

    Li F, Liu Y, Liu HC, Feng HL

    Beijing da xue xue bao. Yi xue ban = Journal of Peking University. Health sciences 2018; (50(4)):666-671.

    PMID: 30122769
  18. 18

    A case of multiple rootless teeth: A case report and review.

    Gopalakrishnan S, Balasubramaniam N, Ramamoorthi R, Vedachalam R

    Journal of oral and maxillofacial pathology : JOMFP 2021; (25(3)):559 doi:10.4103/jomfp.jomfp_337_20.

    PMID: 35281176
  19. 19

    New Immunohistochemical Findings on Amelogenin and Dentin Sialophosphoprotein in Genetic Tooth Diseases.

    Camacho-Escalera C, Ortega-Pinto A, Rojas-Flores S, et al.

    International dental journal 2025; (75(5)):100907 doi:10.1016/j.identj.2025.100907.

    PMID: 40712386

This page provides educational information about Dentinogenesis Imperfecta symptoms and genetics. Always consult your dentist or medical geneticist for an accurate diagnosis and treatment plan tailored to your family's needs.

Get notified when new evidence is published on Dentinogenesis imperfecta.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.